Dioaea muscipula nutrient transporters employ channel-like properties

• Autorzy: Krol E. , Bohm J. , Scherzer S. , Kreuzer L. , Hedrich R.
• Języki publikacji: EN

Abstrakty

EN

Two Venus flytrap transporters, ammonium DmAMT1 and sodium transporter 1, were found to be abundant in traps and up-regulated when glands were stimulated for digestion. Neither DmAMT1 nor sodium transporter 1 acted as H+ symporters. An electrochemical gradient empowered cation uptake exclusively. Moreover, a weak temperature dependence (Q10=1.3) additionally pointed to a passive transport mechanism. Hence, both transporters exhibited the hallmark properties of channels. Km decreased systematically with an increasing negative clamp-voltage. Consequently, in case of DmAMT1 we noted a voltage dependent shift toward high affinity transporters in hyperpolarized cells. From our findings we conclude that membrane potential readjustments in glandular cells provide for effective nutritional strategy in flesh-eating plants.

• Wydawca: -
• Czasopismo: Acta Neurobiologiae Experimentalis
• Rocznik: 2014
• Tom: 74
• Numer: 3
• Opis fizyczny: p.333

Twórcy

autor

Krol E.

• Institute for Molecular Plant Physiology and Biophysics, Wurzburg, Germany
• Department of Biophysics, Maria Curie-Skłodowska University, Lublin, Poland

autor

Bohm J.

• Institute for Molecular Plant Physiology and Biophysics, Wurzburg, Germany

autor

Scherzer S.

• Institute for Molecular Plant Physiology and Biophysics, Wurzburg, Germany

autor

Kreuzer L.

• Institute for Molecular Plant Physiology and Biophysics, Wurzburg, Germany

autor

Hedrich R.

• Institute for Molecular Plant Physiology and Biophysics, Wurzburg, Germany